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(i) An object orbiting the sun with semi-major axis a and instantaneous orbital radius r has a velocity v which can be expressed as:

(i) An object orbiting the sun with semi-major axis a and instantaneous orbital radius r has a velocity v which can be expressed as: 2 V = GM (-1) Evaluate v when G=6.671011 [m/kgs2], M=61024 [kg], r=6978x10 [m] and a = 6978x10 [m].

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